Syngas Fermentation Gas Feed Control Patents: Who Leads 2026
- 71.2% concentration. The top 5 of 74 ranked assignees hold 306 of 430 records in scope — a field with one dominant filer and a long tail behind it.
- Filing peaked in 2017. 47 records that year versus a confirmed -71% drop from 2021 (17) to 2024 (5), the most recent complete year.
- Claims cluster in fermentation, not hardware. 94.4% of records sit in C12P (fermentation/enzymatic synthesis) versus 6.0% in C25B (electrolytic production) — feed-control hardware is comparatively open.
Filing growth compares 2021 (17 records) with 2024 (5) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 430 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Syngas fermentation converts CO- and H2-rich gas streams into fuels and chemicals using acetogenic microorganisms, and controlling the gas feed — its composition, flow rate, pressure and CO/H2 ratio — determines both conversion efficiency and product selectivity. This landscape covers 430 published records filed between 2015 and mid-2026 that combine fermentation or gas-fermentation terms with explicit gas-feed parameters (composition, flow, pressure, ratio) under the core IPC classes for fermentation processes and bioreactor apparatus.
The scope captures both microbiology claims (strain selection, genetic engineering of acetogens) and the physical apparatus and process-control claims that govern how gas actually reaches the culture. Because publication lags filing by roughly 18 months, the last one to two years in any trend chart understate real filing activity.
Filing trends and technology composition
Two views of the same 430-record set: how filing activity has moved year over year, and how those records distribute across IPC subclasses. Because a record can carry more than one classification, the subclass shares sum to well over 100% of the record total.
Filing trend: a 2017 peak, then a confirmed decline
Annual filings peaked at 47 in 2017. The comparison the data supports without relying on incomplete recent years is 2021 to 2024: filings fell from 17 to 5, a -71% move over that three-year span. Treat 2025 and 2026 figures as still filling in rather than evidence of a further slowdown.
Technology composition across IPC subclasses
C12P (fermentation and enzymatic synthesis) covers 94.4% of the 430 records, confirming this is fundamentally a fermentation-process landscape. C12M (bioreactors and apparatus, 45.1%) and C12N (microorganisms and genetic engineering, 33.5%) are the next-largest bodies of claims, while C25B (electrolytic production, 6.0%), A23K (animal feed, 4.7%) and B01D (separation processes, 4.4%) mark smaller, more specialised adjacent claim areas.
Shares are the percentage of the 430 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Syngas Fermentation Gas Feed Control with Eureka
This page is one run against one query. Ask Eureka your own question about syngas fermentation gas feed control and every answer comes back with the patent numbers behind it.
Try EurekaFoundational and representative filings
US20240352491A1 — CO2-free waste gas fermentation using acetogen strains
Filed by Gwangju Institute of Science and Technology and published 2024-10-24, this filing describes injecting methanol alongside gaseous substrates during acetogen fermentation to raise gaseous-substrate consumption and convert the CO2 generated in-process into hydrocarbon products, rather than venting it.Abstract condensed from the original filing.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5593886A | Clostridium stain which produces acetic acid from waste gases | 743 |
| 2 | US6136577A | Biological production of ethanol from waste gases with Clostridium ljungdahlii | 655 |
| 3 | WO1998000558A1 | Biological production of acetic acid from waste gases | 576 |
| 4 | US5807722A | Biological production of acetic acid from waste gases with Clostridium ljungdahlii | 515 |
| 5 | US6340581B1 | Biological production of products from waste gases | 407 |
| 6 | WO2017165244A1 | Microorganisms and artificial ecosystems for the production of protein, food, and useful co-products from c1 … | 116 |
| 7 | US20130210096A1 | Methods and Systems for the Production of Hydrocarbon Products | 59 |
| 8 | WO2015058011A1 | Improved carbon capture in fermentation | 51 |
| 9 | US20220136119A1 | System and method for carbon dioxide reactor control | 46 |
| 10 | US20120052541A1 | Improved carbon capture in fermentation | 31 |
Citation counts favour older filings simply because they have had more time to accumulate citations within the searched corpus; read them as a signal of foundational influence, not of current filing activity.
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Three figures from this dataset matter more than the rest for deciding where to file, litigate, or design around existing claims.
One filer dominates the ranking
The leading assignee alone accounts for 80 records against a fifth-place figure of 34 and a tenth-place figure of 8 — a steep drop-off rather than a gradual one. New entrants are filing into a field where the top of the ranking is already occupied by dense, overlapping claims.
Activity has cooled from its 2017 peak
The 47 filings recorded in 2017 have not been repeated since, and the 2021-to-2024 comparison shows a clear decline in complete-year data. Recent-year momentum tables show the leading assignees each recording 0 filings in the latest year, consistent with a maturing rather than expanding claim landscape.
Fermentation claims dwarf electrolytic-route claims
Almost every record touches core fermentation process claims (C12P), while only 26 records (6.0%) touch electrolytic production of compounds (C25B). Apparatus-adjacent classes like separation (B01D, 4.4%) and animal-feed use (A23K, 4.7%) are present but thin, suggesting narrower, less-crowded claim space there.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to syngas fermentation gas feed control, with the prior art for and against each one.
Who holds the ground, and where it thins out
The ranked leaders sit atop a long tail: 74 assignees have any record at all, and the gap between the leader (80 records) and even the fifth-place holder (34) is wide. Co-assignee pairings are sparse — only 10 pairs recorded, dominated by internal corporate-family combinations rather than joint ventures with outside partners — which suggests most of the substantive R&D here has stayed in-house rather than being licensed or co-developed.
A single filer sets the claim boundary
With 80 records versus 34 at fifth place, the top assignee's portfolio spans strain, apparatus and process claims broadly enough that most new filings in the field will need to be checked against it first.
A crowded but thinner middle tier
The top 10 combined hold 355 of 430 records (82.6%), meaning the mid-tier assignees are filing into gaps left around the leader's claims rather than opening genuinely new ground.
Momentum has stalled across the top names
Recent-year momentum data shows the leading assignees, including the dominant filer's affiliated entities, at 0 filings in the latest tracked year. Given the 18-month publication lag, this likely reflects filing pipeline timing as much as reduced R&D activity.
| Assignee | Recent year | YoY |
|---|---|---|
| LanzaTech NZ, Inc. | 0 | — |
| LanzaTech Inc. | 0 | -100% |
| LANZATECH NZ INC | 0 | — |
| Jupeng Bio (HK) Limited | 0 | — |
| Synata Bio, Inc. | 0 | — |
| Coskata, Inc. | 0 | — |
| Jupeng Bio, Inc. | 0 | — |
| INEOS Bio SA | 0 | — |
Where to take this analysis
This landscape identifies concentration and white space; turning that into a filing or freedom-to-operate decision requires drilling into specific claims.
Check freedom-to-operate on gas-feed control claims
Run the specific CO/H2 ratio, pressure-staging or off-gas recycling concept you're evaluating against the top assignee's full claim set before committing R&D spend.
Explore in EurekaTrack the leading assignee's continuation filings
With 71.2% concentration in five companies, monitoring new publications from the top filers is more informative than watching the field broadly.
Set up monitoring in EurekaAssess the under-claimed apparatus branches
C25B and B01D overlaps sit at single-digit shares of the 430 records — worth a closer technical read before assuming they're open.
Run a deeper search in EurekaCommon questions on this landscape
One assignee leads the ranked field with 80 of the 430 records in scope, well ahead of the fifth-ranked holder at 34. The top 5 of 74 ranked assignees together account for 306 records, or 71.2% of all records in scope, so the field is concentrated rather than evenly spread. Anyone evaluating freedom to operate should check that leading portfolio first, since it spans strain, apparatus and process-control claims rather than a single narrow area.
Filing peaked in 2017 at 47 records and has declined since; the clearest complete-year comparison available shows filings falling from 17 in 2021 to 5 in 2024, a drop of 71%. Because publication typically lags filing by around 18 months, the 2025 and 2026 figures in any chart are still filling in and should not be read as proof of a further decline. The safest reading is that filing activity has cooled from its 2017 high rather than that it has stopped.
Core fermentation and enzymatic-synthesis claims (IPC class C12P) appear in 94.4% of the 430 records, making them by far the most heavily claimed area, followed by bioreactor and apparatus claims (C12M, 45.1%) and microorganism/genetic-engineering claims (C12N, 33.5%). Electrolytic production of compounds (C25B), animal feed uses (A23K) and gas separation apparatus (B01D) each sit at single-digit shares of records, indicating thinner claim coverage in those adjacent areas. Because records can carry multiple classifications, these percentages overlap rather than summing to 100%.
US20240352491A1, filed by Gwangju Institute of Science and Technology and published 2024-10-24, covers a CO2-free waste gas fermentation method that injects methanol alongside gaseous substrates during acetogen fermentation and converts the CO2 generated in-process into hydrocarbon products rather than releasing it. The method as described covers the two-step process of introducing microbial strains into a bioreactor and then feeding gaseous substrates plus methanol to drive that conversion. Anyone working on methanol co-feeding or in-process CO2 capture during acetogen fermentation should read its claims closely rather than relying on the abstract alone.
Based on the IPC composition, the smaller-share classes point to under-claimed territory: electrolytic syngas conditioning (C25B, 6.0% of records), membrane or filtration-based gas separation ahead of the feed stream (B01D, 4.4%), and animal-feed applications of fermentation products (A23K, 4.7%) all sit well below the dominant fermentation-process classes. Co-assignee data also shows only 10 recorded pairings, mostly within a single corporate family, suggesting little cross-company collaboration to date. These lower-density areas are worth a closer technical and freedom-to-operate review rather than being assumed open, since low share is not the same as zero risk.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.